Improvement in malt-kiln tiles



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Patented VJuly 21, 1868.

um ..Mw u 4 N. PETERS, FHOTO-LITHOGRAPHER. `WAS51INGTON| D C.

THOMAS G. `aRNoLD,- oF NEW YORK, N. Y.

Letters Patent Nia. 80,110, dated July 21,1868.

IMPROVEMENT In MALT-KILN TILES.

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TO ALL WHOM IT MAY CONCEBN:

Be it known that I, THOMAS G.A.RNOLD, of the city, county, and State of New York, have invented certainV new and useful Improvements in Cast-Iron Malleable Malt-Kiln Tiles; vand Ldo hereby declare that the following is a full description of the same. l In malt-kiln tiles heretofore made, clay, or perforated wrought sheet metal has been' used. The objections to the use of clay tiles are numerous, but particularly their liability to break and chip or splinter ott', therebyl making an uneven floor, and greatly adding to their expense to keep the floor in order.

To overcome these objections, perforated wrought sheet metal has been introduced into use., Though they obviate thechipping and splintering ofthe clay tiles, they fail entirely to overcome the greater evil o f unevenness, owing to their dishingv out, or bending down between their supporting-points, under the weight of the maltsters'in'iwalliing on thcm,'to stir up the malt in the process of malting. My invention, therefore, is'to overcometheseobjections to the use of either the clay or perforated wrought sheet-metal tiles.

' And the nature thereof consists in making malleable cast-iron tiles of any suitableV size, strengthened on the under side by ribs crossing each other at rightkangles, and uniting with a marginal ledge surrounding them,

so that they may be bolted together to form the floor, and thereby obtain the solidity of the clay tiles, with the toughness and strength of wrought iron, and the cheapness of cast iron.

But 'to describe my invention more particularly, I will refer to the accompanying drawings, forming a part of this specification, the same letters of reference, wherevermthcy occur, referring to like parts.

Figure 1 is a perspective view of two ofthe tiles, as bolted together. Figure 2 is a lower plan view vof the tiles, showing the ribs, and mode ofbolting the tiles together. Figure 3 is a cut section of one of the tiles, showing the mode ofcasting the perforations in them.

Letter A represents the tile, having on its under side a. continuous marginal ledge, B, ofiany suitable depth 4 for supporting the tiles uponvx and above the'bed on which' they are laid. The object of this ledge-formation is, first, to obtain a framework, (or what may be called side `rails,) sovthat the tiles may be locked or bolted together,

as shown at c, iig.

which they may be placed; second, to form a supporting framework on which the-tiles rest, and thus give solidity to them on the bed ofthe kiln. f

To strengthen the tiles between the ledges or side-rails, a not-work of ribs, E, is cast on their lower sides,

of a depth nearly equal to the depth ofthe ledges The object of this is obvious, as it enables me to reduce the thickness of the tiles to the minimum of pcrforatedwrought sheet-metal tiles, und yet retain the requisite strength when made malleable; and, secondly, in consequence of casting them as thin as wrought perforated sheet-metal tiles, enables me, by the device of flaring the perforations on'the under side of the tile, as shown at F, tig. 3, to cast the tiles with the perfrations G in them.' Without thus having the tiles as thin as sheet metal,

and making the holes flaring on the under side it would not be possible to make a cast-iron tile with the numer-l ous small perforations required. This fact may not be so Vgenerally known as 'to beappreciate'd by those not conversant with the practical diihculties in moulding and working in cast iron. To those, however, Well acquainted with the subject, the' importance of these improvements would be recognized at once, as entirely overcoming the difficulties heretofore experienced in making cast-iron malt-kiln tiles cheap enough to compete with the clay# l burnt or wrought perforated sheet-metal tiles, and at the same time making a smoother and more 4solidfloor,

and of greater durability of wear thanpossible to be obtained by the use of either.

Having now described my invention, I will proceed to set forth, what I claim and desire to secure by Letters Patentof the United States.

I claim cast-iron malleable malt-kiln tiles, having a. marginal ledge, land cross-barsror ribs on their under sides, as a new article of manufacture, constructed substantially as hereinbeforc set forth', and for the purposes described.

T. G. ARNOLD.

Witnesses:

FRANKLIN BAnnrTT, Guantes L. BAmuTT.

2, through the bolt-holes D, Eg. 1; as the bolt-holes are all for-med at the same part in eachrail, and the tiles are 'all of one size, it will readily be perceived that they will fit together in any position in 

